GCSE Chemistry - Condensation Polymers (Polyesters) #60

[@Cognitoedu]

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[@virajmokashi9303]

I believe there is an error on the condensation polymer at around 3 minutes there is a missing oxygen bond on the c in the final polymer

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No one cares about how much subs u got

[@adamabiani1134]

Learned more in 5 minutes than my 2 years of chem GCSE lmao. Cheers.

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[@Cognitoedu]

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It hasn't been o levels in 37 years

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Typical Sri Lankan shit fr bruv. GCSE is easier than the shit we are doing called OL 😪.

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@@magnusmights2265 Could not get the joke? Would you mind explaining good sir?

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I understand this much better here 🙌

[@yummysweets620]

bro saved me, i was so confused after reading the revision guide, this is sm more clear!!

[@rakeshgs7620]

Was scratching my head over Condensation Polymers yesterday (even after studying the official revision guide) and so decided to watch a video today to better understand it. I sit here now with near complete understanding of what you've shown in the video and a flashcard with everything I need to know on this topic for my upcoming mocks. Thank you :)

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I finally understand ..and it’s one day before my exam …

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Me too. Good luck tomorrow! Also, how did you find English Language Paper 2? Everyone has such different opinions on how it went...

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@@michaltam6694right so . 4 marker I think I over thought it but idk .question 2 was okay .question 3 was also fine .But question 4 I think I was stressed cause of the time so I didn’t write that much .And question 5, the statement could’ve been better, smth other than cars tbh . Also tell me why the train was bullying everyone 💀💀

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This YT channel is very underrated, THis maybe be my key to chemistry success in IGCSE

[@Cognitoedu]

Ah thank you so much Bilal, we wish you all the success 👍

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thank you so much, that's the only video I saw and understand this process, thank you for ages❤❤❤❤❤❤❤💕😊

[@Cognitoedu]

Thanks ali, glad we could help 😊

[@flyingmorningdew]

what a fantastic illustration of the polymerization process! much appreciated for the insights.

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YOU ARE MY HERO

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the only places that i actually understand from :)

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thank you so much cognito you have really saved my grades , im more of a visual learner so by watching your videos it really helps me .By watching your videos and doing the interactive questions I have managed to pull myself from a grade 4 to a grade 8 , it couldn't have been done without these videos and the new website.Thank you very much. to all those that are reading this comment don't give up and remember slow and steady wins the race.🥰

[@Cognitoedu]

Thank you so much aqsa khan, that's really incredible and we're so glad we've been able to support your progress 😊

[@rowayda7535]

this helped me clear all my doubts on condensation polymerisation!! thank you so much for your hard effort. i was wondering if you also made a video on making polyamides, I'm still confused about that part. thank you!!

[@danielxoxo.]

I swear I hate chemistry so much.

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Yup got my chemistry gcse tomorrow,feeling the same rn.

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Try biology and then you'll cry

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@@commandmax3931bio paper was easy , but kinda afraid of tomorrow chemistry paper

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thank you soo much, I was so confused before watching the video but you made it so much easier to understand.

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Love your lessons cognito❤

[@xtr4me_abu185]

0:59 if the general formula for alcohol is CnH2n+1OH then why is there 1 carbon and 2 hydrogens on each side with the functional group OH? shouldn’t it be like one carbon and three hydrogens then the added OH bond @cognito

[@justsomeone5660]

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Happy to help!

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[@notmehense]

Why do we need 2 functional grps?

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[@athegameroffical]

Have you done the video of additional polymers?

[@Cognitoedu]

We have! It should come up if you search ‘addition polymers cognito’

[@athegameroffical]

Ok thanks

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[@MercylynMatanga]

This is helpful.thanks

[@danishaiman1194]

Very helpful sir.Thank you

[@francaglover6923]

why does the acid not the alcohol give out the hydrogen

[@mochitaetae7616]

Can u pls tell me whether all condensation polymers are copolymer??

[@fitnessforge-20]

merci beaucoup monsier♥️

[@avnishchate3070]

why does the acid give up its hydroxide ion instead of the alcohol even though both of them have hydroxide ions?

[@mohamed-elfatih9933]

Good question

[@talamahmoud6219]

Because ethanol will change if it gives up its OH

[@abortive1581]

the acid and the alcohol both have hydroxyl groups (-OH), but the process works a bit differently. The acid usually donates its hydroxyl group because the reaction between the carboxyl group of the acid and the hydroxyl group of the alcohol forms a water molecule and a bond, creating the polymer chain. The alcohol’s hydroxyl group is involved in forming the ester linkage, but it’s the acid’s hydroxyl group that typically gets released as water in the process. This step helps drive the reaction forward, leading to the formation of the polymer.

[@bilalalthaf3927]

I finally understood this topic

[@galefray]

I'm so curious why 2H₂O Molecules are produced per repeating unit...?

[@nic0264]

because theres a double condensation meaning 2 water molecules are produced, the first one when the first pair of OH (from the dicarboxylic acid) and H (from the diol) leave their structures and the second when the same thing happens with the pairs of the other end of each structure

[@abortive1581]

two water molecules are produced per repeating unit because each ester bond formation involves a hydroxyl group (-OH) from the acid and a hydrogen atom (H) from the alcohol. When these combine to form the ester linkage, a molecule of water (H₂O) is released. Since each repeating unit in the polymer chain involves two ester bonds (one from each end of the unit), a total of two water molecules are produced for every repeating unit added to the chain. This is why you see two water molecules released per repeating unit in the polymerization process.

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Is this suitable for dse takers as well🤔

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[@ZestyGecko7]

PLEASE HELP - how do you know/work out what the product is?

[@maximusekon146]

the product is a polyester

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I subscribed!! epic vdeo

[@varishpersaud5093]

Nice video but why is another water molecule lost when drawing the repeating unit? Is one water molecule lost when the two monomers combine, then another when another ester joins?

[@Cognitoedu]

Hi, so tor from the repeating unit, one H2O is lost from the ester bond in the middle, but then another H2O is effectively lost from the 2 ends, in preparation for the formation of new ester bonds at either end. It's a bit weird because it's not really an equation for a single reaction, but a summary of all the condensation reactions. Hope that helps :)

[@varishpersaud5093]

@@Cognitoedu Oh that makes sense now, as the H from the diol and the OH from the carboxyl make up a second water molecule. Thank you!

[@Cognitoedu]

Exactly!

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is this for aqa triple ?

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It's for any gcse exam board

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Very helpful

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Thank you

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Best vid ever! Helped out a lot!

[@fiso64]

Hey, thanks for the great explanation. Though I don't understand why those 2 prerequisites you mentioned are required for a polycondensation reaction, and I can't even find any info on that elsewhere.

[@kushmalataj660]

I didn't two water molecules removal step

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[@okasha6224]

Polyester are biodegradable? Some studies show that they are not. (Could you clear that for me)

[@hayawiii8752]

Some are biodegradable these are known as biopolyesters

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1 and a half hours to go 😭

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i just realized the diol one is (OH-) not (OH-C-C-) as stated in the video

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